Crankshaft Position Sensor Issues in the 2003-2008 Nissan Maxima
If your Maxima is stalling or won't start, a faulty crankshaft position sensor is a very common cause.
- A failing crankshaft sensor is a critical issue that can cause your Maxima to stall while driving; do not ignore the symptoms.
- Check if your vehicle's VIN was part of NHTSA recall 03V455000 for this exact problem.
- Due to potential communication errors, it is highly recommended to replace both camshaft sensors when you replace the crankshaft sensor.
- Many owners strongly prefer OEM (Hitachi) or premium aftermarket sensors to avoid repeat failures common with budget parts.
Is Your Maxima Stalling or Hard to Start?
A failing crankshaft position sensor is a well-known and frequent problem for the 2003-2008 Nissan Maxima. The symptoms often begin as minor annoyances but can quickly become serious, potentially leaving you stranded. Because this sensor is essential for engine operation, ignoring the warning signs can be dangerous, as the engine can shut off unexpectedly while driving.
Known Issues: Recall and Technical Service Bulletins (TSBs)
NHTSA Recall 03V455000: Nissan issued a major recall for early models in this generation, including the 2003 Maxima, because the original crankshaft position sensors could fail from heat stress. This defect can cause the engine to stall without warning, creating a significant safety risk. Before buying parts, check with a Nissan dealer or on the NHTSA website with your VIN to see if your vehicle was part of this recall and if the repair was completed.
TSB NTB03-124: Nissan also released a bulletin noting that replacing just the crankshaft sensor without also replacing the camshaft sensors could cause communication problems. The new sensor may not work correctly with the older, original-style sensors. Because of this, many mechanics recommend replacing the crankshaft sensor and both camshaft sensors at the same time as a set.
Choosing the Right Aftermarket Sensor
When it comes to electronic sensors for the Nissan VQ35DE engine, there is a strong debate between OEM (Original Equipment Manufacturer) and aftermarket parts. Many experienced Nissan owners and mechanics report that budget aftermarket sensors can be unreliable or fail prematurely. While an aftermarket part can save you money upfront, a second failure means doing the job all over again.
Pro Tip: The original OEM sensor manufacturer for Nissan is often Hitachi. If choosing an aftermarket part, look for reputable brands known for their electronic components. Ensure the part has a good warranty and matches the correct OEM part number for your vehicle, as there can be slight differences between model years and transmission types.
Cost of Replacing a Crankshaft Position Sensor
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Part | $31.86 - $35.34 |
| New OEM Part | $60 - $165 |
| Shop Labor | $64 - $140 |
| Total Estimated Cost (Aftermarket) | $96 - $175 |
| Total Estimated Cost (OEM) | $124 - $305 |
Frequently Asked Questions (FAQ)
Where is the crankshaft position sensor located?
On the 2003-2008 Maxima, the crankshaft position sensor is located on the bottom of the engine, where the engine block meets the transmission. You will need to safely raise the front of the vehicle to see and access it. It is typically held in by a single 10mm bolt.
Is this a difficult part to replace myself?
For a DIYer with basic tools, this is a feasible job. The main challenge is the tight space. The process involves safely lifting the car, locating the sensor, disconnecting the electrical plug, removing one bolt, and pulling the old sensor out. The job can usually be done in under an hour.
What's the difference between a crankshaft and a camshaft sensor?
They look very similar and perform a similar job, but they monitor different parts. The crankshaft sensor reads the position of the main crankshaft. The two camshaft sensors read the position of the camshafts in each cylinder head. On this Maxima, all three sensors are known to fail and are often replaced together.
Do I need to replace the camshaft sensors at the same time?
It is highly recommended. Due to a technical service bulletin from Nissan (NTB03-124), mixing a new crankshaft sensor with old camshaft sensors can cause communication errors and prevent the car from running properly. For best results, replace all three sensors as a set.
Technical Specifications
OEM Part Numbers: 23731-AL61A 23731-6J90B 23731-8Y00A 23731-8Y001 23731-8Y005
The 3.5L VQ35DE engine in the 2003-2008 Maxima uses one crankshaft position sensor and two camshaft position sensors. The crankshaft sensor is located at the bottom of the engine near the transmission bell housing.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Nissan Maxima: